Multiple workpiece chuck



Oct. 12, 1954 P. A. GROBEY 2,691,531

MULTIPLE WORKPIECE CHUCK Filed May 20, 1952 2 Sheets-Sheet l Oct. 12, 1954 Filed May 20, 1952 P. A. GROBEY MULTIPLE WORKPIECE CHUCK 2 Sheets-Shae; 2

Patented Oct. 12, 1954 UNITED STATES PATENT oFFIcE;

' 2,691,531 7 MULTIPLE WORKPI-ECE CHUCK Paul A. Grobey, Springfield. Vt., assignor to Bryant Ghu'cking Grinder Company, Springfield, Vti, a corporation of Vermont Application May 20., 1952, Serial No. 288,777

13 Claims. I This invention relates to chucks and has for an object to hold a plurality of work pieces; simultaneously, centering them from their outside surfaces, and clamping them together endwise. For this purpose the work pieces are held by pivoted end clamping jaws against a backing member and are centered by members carried by the jaw operating means.

For a complete understanding of this invendrawings in which Figure 1 is an outer end face view of a chuck embodying the invention.

Figures 2 and 4 are detail sectional views on lines 2-2 and 44, respectively, of Figure l. Figure 3 is a detail sectional view to a smaller scale than Figure 2 and showing the rear portion of the work spindle. I Figure 5 is similar to a portion of Figure 4, but showing the chuck jaws open and work pieces being ejected. Figure 6 is a detail sectional view on line 6-6 p f figure 4 Figure 7 is a detail sectional view on line 1-1 Figure 5. Referring first to Figures 2, 4, and 5, at l is Mmthe forward end of a rotary spindle proith means such as a standard spindle m toriattachment of a chuck thereto. As

annular forwardly projecting portaperedv outer. wall and having a which. the chuck may be setion, reference may be had to the accompanying 10 for example, this standard spindle nose may be attached thereto as shown in Figure 2 as by the screws, 20. r

The outer ends of the elements II are turned inwardly toward the axis of the body and these inturned ends may be faced with a yieldable cushioning material such as rubber as at 22'. The inner faces of these members 22 are carefully ground to render them coaxial with reference to the bodyandthe spindle, and when the jaws I 6 are in the substantiallyradial position shown in- Figure 4, the inner faces of these members 22 close against the outer peripheral faces of the work pieces W and hold them in alinement with each other and with their outer faces concentric, leaving their inner faces free for a machining operation in coaxial relation to the outer faces are grippedby the elements 22. Since these elements M are pivoted to the jaws l6, it will be evident that as the jaws l6 are swung forwardly to release their backward pressure on the work pieces, the elements 22 are given a radial outward component of motion which releases them from pressure against the outer faces of the work pieces. Thus both the elements [4 and the jaws l6. are moved either to clamp or release the work pieces simultaneously with each other. The clamping jaws and the elements M are normally pressedtoward clampingposition as by coil springs 25, each housed within one of the elements I4 and reacting at their rear ends against the forward faces of the leaf springs HIV and at their forward faces against abutments 2-6, each carried by a plate 21 seated in a slot H at its outer end and at its inner end riding within slot 28 in the corresponding elements l4 and slecured to the forward face of the body member 7 as by screws was shownin Figure 4. Thus inimum tend to theclamping jaws and 1954 DE ELDON E. HAYNER 2,691,532

STOP DEVICE FOR ROLLER SKATES Filed March 20, 1953 

